Type-writing machine



(No Model.)

G. 0. ERWIN & F. WINKLER.

TYPE WRITING MACHINE.

Patented Oct. 10

UNITED STATES PATENT OFFICE.

CHARLES O. ERWIN AND FRANK WINKLEB, OF KANSAS CITY, KANSAS.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 506,427, dated October 10, 1893. Application filed June 22, 1893- Serial No. 478,422- (No model.)

To all whom it may concern.-

Be it known that we, CHARLES O. ERWIN and FRANK WINKLER, of Kansas City, Wyandotte county, Kansas, have invented certain new and useful Improvements in Type-Writers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

Our invention relates to typewriters; and

the object of our invention is to produce an attachment by which the printing-cylinder of a typewriter may be securely held in any position of rotation desired, and entirely independent of the ordinary pawl and ratchet mechanism of the machine. 7 With these objects in view, our invention consists in certain peculiar and novel features of construction and arrangement as hereinafterdescribed and claimed.

In order that our invention may be fully understood, we will proceed to describe it with reference to the accompanying drawings, in

which- Figure 1, is a perspective view of a portion of a typewriter printing cylinder, and showing our improved penetrable disk secured upon the end thereof. Fig. 2, is a perspective view of the sliding frame and the locking disk carried thereby. Fig. 3, is :a horizontal sectional view of a portion of the printing cylinder, and showing also in section our pcnetrable disk and the locking disk in engagement with said penetrable disk. Fig. 4, V

is a view looking toward the end of the printing cylinder, and showing the penetrable disk carried thereby with the inner and outer rings removed. Fig. 5, is a rear or outer view of the locking disk, and Fig. 6, is a detail sectional view of the locking disk to clearly disclose the construction and arrangement of the spring-actuated pin mechanism.

Before entering upon a detailed description of the invention, we wish to state that this attachment is designed particularly as an improvement over the application for improvements in typewriters, filed by us on March 31, 1893, Serial No. 468,508,and patented J title, 20, 1893, No. 499,723. We found in practice that operators knowing the cylinder was not held from rotation by the usual pawl and ratchet, without first throwing the lockingdisk from engagement with the penetrable disk, would attempt to, rotate the cylinder, and that with everysuch attempt the penetrable disk was torn or injured by the pins or points of the locking-disk, so that in a very shorttime it would be necessary to replace said disks with new ones. To obviate this. trouble and expense, the present invention is ordained, and it consists simply in providing the penetrable disk with metallic bands or rings, having holes or recesses and in ,providing the locking-disk with one or more spring-actuated pins to engage said recesses and thereby relieve the penetrable disk of all strain should the operator attempt to rotate the cylinder without first moving the lockingdisk from. engagement with the penetrabledisk.

We make use in this case as faras practical of the same reference numerals for analogous parts as we have in the aforesaid application.

Referring to the drawings, 2 designates the printing cylinder of a type-writer which is revolubly mounted upon a stationary shaft or axle 3 supported in'the upper. portion of a machine in the usualmannerg. Supported horizontally and forming-a portion of the traveling carriage of the machine isthe tubular rod 10, which is formed with a longitudinal slot 29 at the end of the cylinder'opposite to that usually occupied by the ratchet.- wheel of Smithr Premier typewriters, and adapted to slide within said tubular. rod, '.is

a slide-rod 30. A yoke-frame approximately U-shaped is secured rigidly or formed integrally at the junction of its arms 32, upon the end of a tube or sleeve 31 which surrounds loosely the tubular-rod 10, and a setscrew 33 passing through said tube or sleeve and also through the slot 29 of the tubularrod, screws into the slide-rod 30. A disk 3. L having acentral opening fittingloosely around the collar or washer 3, of the shaft or axle 3, is carried rigidly atthe outer ends of the arms 32-32 of the yoke of the tube or sleeve 31, and this disk is provided at its inner side with a circular shoulder or ring 3?; this shoulder or ring p'rojectingfrom the face of said disk a suitable distance and having a series of pins or points 35,projecting therefrom and toward the adjacent end of the printing cylinder. In place of the usual disk secured to theleft-hand end of Smith Premier type writer cylinders, we secure a thin circular plate 37, which is of slightly less diameter than the cylinder, this plate being formed with a hub-portion 41 which encircles the shaft or axle 3, and projects outwardly. This hub-portion is externally screw threaded. An annular and outwardly projectingflange 42 is formed at the outer margin of the said plate, and this flange is also externally screwthreaded. A disk 36 of felt or. other penetrable material is fitted snugly within the outer flange and against the face of the circular plate, and is formed with acentral opening 36", the diameter of which slightly exceeds the diameter of the hub-portion41, so that'a circular space shall be formedv there: between. In order to securely hold this pene. trable. disk in place, a ring 43 internally screw-threaded is screwedupon the flange 42, and an inwardly projecting circular flange 44 at the outer marginof the ring 43, fits snugly againstthe face of the penetrable disk, near its outer margin. A. smaller ring 45. also in* ternally screw-threaded is screwed uponthe hub 41;t-hus occupying the circular space hetweenthe .penetrable disk and saidhub, and extending outwardly from the outer margin of the ring 45, is. thecircular fiange-46; said flangorbearing againstitheouter side i of the penetrable -disk near its inner margin. It will thus be seen that a circular space intervenes between the inner and outer flanges 46 and 44 respectively, through which access may be had to the exposed portionofi the penetrable disk. printing upon a blank or sheet of ruled paper, it is designed toholdthe cylinder from rotatable movement by engaging the exposed portionbfithe penetrable disk by the pins or points 35 of thelocking-disk, the circular shoulder or flange 34, thereof, occupyingthe space between the innerand outerflanges 46. and 44, as clearly shown in Fig. 3.

Now, when it is desired to disengage the locking-disk fromthe penetrable disk, the slide-rod 30 is caused to move in the direction of the arrow Fig. 3, by means of mechanism clearly shown and described in our patent hereinbefore mentioned, (referenceto which isherewith. made,) and there held. As be: fore mentioned without some auxiliary or means to resist the rotation of the cylinder when engaged by the lockingdisk, the penetrable-disk is soon torn and rendered useless, so we perforate or. recess closely in circular series the flanges 44 and 46, as shownat47. It is to be understood of course, that only one of. these flanges may be perforated or recessed or. that one or more series of circularly arranged perforations or recesses maybe formed, or that serrations or ratcheteteeth may be formed in placeof the perforations or recesses. Should two series of perforations or recesses 47 be formed in the flange 44 and one series in flange 46, as shown, pins corresponding in Now, while the machine is number to said series should be provided to engage one or the other of; said perforations or recesses. These pins 48 pass horizontally through the locking-disk and. have heads or enlargements at their outer ends which 00- copy and fit snugly within tubular and horizontal projections 49 at the outer side of said locking-disk, and these tubular projections are internally screw-threaded at their outer ends, to receive screw plugs 50. Spiralsprings 51 are fitted within said tubular-projections and hear at their opposite ends against the inner ends of the screw-plugs 50 andthe headed ends of the pins; the tendency of said springs being to force and hold the pins in their extended position toward the adjacent end: of: the. cylinder. These spring-actuated pins being arranged the same radial distance from .theiaxisof the shaftor axle as the corresponding series of circularly arrangedperforations orrecesses, it will be seen that as. the locking-diskjis moved inward or toward'theend of the cylinder, thesaid pins will, as the pins or points 35 engagethe penetrable-disk, either each engage oneof the perforations of its corresponding series or come in contact with thefaceof the flanges 45, and 46; between. two of theperforations ornrecesses of theircorresponding series of perforations or recesses. Of course, should one or more of thespring-actuated; pinsem gage perforations or. recesses in their corresponding series. when the locking-disk is moved inward, it willvbeseenthat anyattempt to rotate theicylinder will besuccessfullyresisted and the strain'will beiborne by saidpins and not.bythe penetrabledisk. Should, however, the pins not engage the said perforations or recesses, by coming incontact with theifaces of the flanges 45.:and 46,2 they will be forcedoutward, sothat. their headed ends shall compressthe. springs 51. It will now. be seen that the pins orpoints 35 engaging the penetrable disk, hold the cylinder from rotatable movementand should the op erator attempt to rotate the cylinder without first moving the locking-disk therefrom, the slightest movement of said cylinder will present one of the perforations oppositeits cor.- responding-pin and the pressure of the spring causes said pin to immediately move forward and engage said perforation or recess, thus locking the cylinder fromfurther movement.

From the above description it will be seen that we have provided an attachment which will effectually when in engagement, lockthe printing cylinder from rotatable movement and will'at the sametime relieve the. penetrable-disk of all strain.

Having thus describedour invention, what we claim as new, and desire to secureby Letters Patent, is-

1. Ina typewriten-the combination with theprinting-cylinder, a penetrable-disk seq cured uponone end thereof, and rings having circular series of perforations, of a lock ing-disk having pins or points to engage the penetrable-disk, and spring-actuated pins to engage the perforations of the rings, substantially as and for the purpose set forth.

2. In a typewriter, the combination with the printing-cylinder having a penetrable disk at one end, and rings having flanges adapted to retain the penetrable-disk in position and also perforated in circular series, of a slide-rod and a locking-disk carried by the slide-rod, and having pins or points adapted to engage the penetrable-disk, and having also tubular projections and pins having heads engaging the tubular projections and passing through the locking-disk, and springs interposed between the closed outer ends of said tubular projections andthe heads of said pins, and means to move the slide-rod, substantially as set forth.

3. In a typewriter, a printing-cylinder, a circular plate secured to one end of the'cylinder and having a tubular hub-portion encircling the shaft or axle of the cylinder, and externally screwthreaded, and a circular flange at the outer margin of said plate also said plate, and outwardly and inwardly ex-, tending flanges perforated in circular series.

of the hub engaging ring and the flange engaging ring respectively, these perforated flanges bearing against the penetraole-disk, and a locking-disk having pins or pointsto engage the penetrable-disk and also having spring-actuated pins to engage the perforations of the flanges at the outer side of the penetrable-disk, substantially as set forth.

In testimony whereof we afflx our signatures in the presence of two witnesses.

CHAS. o. ERWIN. FRANK WINKLER.

Witnessesi V MAUD FITZPATRIOK, M. P. SMITH. 

